1 Exampromax - Stuvia US
Computer Networking Chapter 1 -
Review Questions and Answers 100% Correct
Answers Already Graded A+
Q: What is the difference between a host and an end system?
List several different types of end systems.
Is a Web server an end system?
Ans: A host is an end system, and vice versa.
Types of end systems: desktops, laptops, smartphones, tablets, automobiles,
various sensors, etc.
Exampromax - Stuvia US
Yes, a Web server is an end system.
Q: The word protocol is often used to describe diplomatic relations. How
does Wikipedia describe diplomatic protocol?
Ans: A protocol is described as the rules of etiquette for heads of state, for
example in what order diplomats address representatives of other nations often in
order of decreasing importance and power.
Q: Why are standards important for protocols?
Ans: Standards are important for protocols so that both communicating
computers are sending and interpreting data in the same order and manner.
Q: List six access technologies. Classify each one as home access,
enterprise access, or wide area network access.
Ans: DSL(Digital Subscriber Line) - Home Access
Cable - Home Access
FTTH(Fiber to the Home) - Home Access
Dial-Up - Home Access
Satellite - Home Access
Ethernet - Enterprise (and Home) Access
WiFi - Enterprise (and Home) Access
3G - Wide Area Network Access
LTE - Wide Area Network Access
, 2 Exampromax - Stuvia US
Q: Is HFC transmission rate dedicated or shared among users? Are
collisions possible in a downstream HFC channel? Why or why not?
Ans: HFC (cable internet) transmission rate is shared among users. There are no
collisions in the downstream channel because all packets come from a single
source, the head end.
Q: List the available residential access technologies in your city. For each
type of access, provide the advertised downstream rate, upstream rate, and
monthly price.
Ans: In most American cities, the current possibilities include: dial-up; DSL;
cable modem; fiber- to-the-home.
HFC - 300 mbps - $65
- 100 mbps - $65
- 2 mbps - $15
Exampromax - Stuvia US
Q: What is the transmission rate of Ethernet LANs?
Ans: Users - 100 mbps
Servers - 1 gbps or even 10 gbps
Ethernet LANs have transmission rates of 10 Mbps, 100 Mbps, 1 Gbps and 10
Gbps.
Q: What are some of the physical media that Ethernet can run over?
Ans: Today, Ethernet most commonly runs over twisted-pair copper wire. It
also can run over fibers optic links.
Q: Dial-up modems, HFC, DSL and FTTH are all used for residential
access. For each of these access technologies, provide a range of
transmission rates and comment on whether the transmission rate is shared
or dedicated.
Ans: Dial up modems: up to 56 Kbps, bandwidth is dedicated; ADSL: up to 24
Mbps downstream and 2.5 Mbps upstream, bandwidth is dedicated; HFC, rates
up to 42.8 Mbps and upstream rates of up to 30.7 Mbps, bandwidth is shared.
FTTH: 2-10Mbps upload; 10-20 Mbps download; bandwidth is not shared.
Q: Describe the most popular wireless Internet access technologies today.
Compare and contrast them.
Computer Networking Chapter 1 -
Review Questions and Answers 100% Correct
Answers Already Graded A+
Q: What is the difference between a host and an end system?
List several different types of end systems.
Is a Web server an end system?
Ans: A host is an end system, and vice versa.
Types of end systems: desktops, laptops, smartphones, tablets, automobiles,
various sensors, etc.
Exampromax - Stuvia US
Yes, a Web server is an end system.
Q: The word protocol is often used to describe diplomatic relations. How
does Wikipedia describe diplomatic protocol?
Ans: A protocol is described as the rules of etiquette for heads of state, for
example in what order diplomats address representatives of other nations often in
order of decreasing importance and power.
Q: Why are standards important for protocols?
Ans: Standards are important for protocols so that both communicating
computers are sending and interpreting data in the same order and manner.
Q: List six access technologies. Classify each one as home access,
enterprise access, or wide area network access.
Ans: DSL(Digital Subscriber Line) - Home Access
Cable - Home Access
FTTH(Fiber to the Home) - Home Access
Dial-Up - Home Access
Satellite - Home Access
Ethernet - Enterprise (and Home) Access
WiFi - Enterprise (and Home) Access
3G - Wide Area Network Access
LTE - Wide Area Network Access
, 2 Exampromax - Stuvia US
Q: Is HFC transmission rate dedicated or shared among users? Are
collisions possible in a downstream HFC channel? Why or why not?
Ans: HFC (cable internet) transmission rate is shared among users. There are no
collisions in the downstream channel because all packets come from a single
source, the head end.
Q: List the available residential access technologies in your city. For each
type of access, provide the advertised downstream rate, upstream rate, and
monthly price.
Ans: In most American cities, the current possibilities include: dial-up; DSL;
cable modem; fiber- to-the-home.
HFC - 300 mbps - $65
- 100 mbps - $65
- 2 mbps - $15
Exampromax - Stuvia US
Q: What is the transmission rate of Ethernet LANs?
Ans: Users - 100 mbps
Servers - 1 gbps or even 10 gbps
Ethernet LANs have transmission rates of 10 Mbps, 100 Mbps, 1 Gbps and 10
Gbps.
Q: What are some of the physical media that Ethernet can run over?
Ans: Today, Ethernet most commonly runs over twisted-pair copper wire. It
also can run over fibers optic links.
Q: Dial-up modems, HFC, DSL and FTTH are all used for residential
access. For each of these access technologies, provide a range of
transmission rates and comment on whether the transmission rate is shared
or dedicated.
Ans: Dial up modems: up to 56 Kbps, bandwidth is dedicated; ADSL: up to 24
Mbps downstream and 2.5 Mbps upstream, bandwidth is dedicated; HFC, rates
up to 42.8 Mbps and upstream rates of up to 30.7 Mbps, bandwidth is shared.
FTTH: 2-10Mbps upload; 10-20 Mbps download; bandwidth is not shared.
Q: Describe the most popular wireless Internet access technologies today.
Compare and contrast them.
